Claude Fable 5.2 vs Gemini 4 Carbon
Pick a route and service tier under each model. Prices, the calculator and the verdicts follow your choice.
At a glance
Generated from the rows below
Choose Claude Fable 5.2 for
- The lowest latency on Phaseo: 3.01 s
- The longest output: 128,000 tokens
- Included in 27 subscription plans
Choose Gemini 4 Carbon for
- The lowest cost per typical request ($0.009)
- The largest context window: 1,048,576 tokens
- The fastest output on Phaseo: 15.3 tps
The models are statistically tied on the Epoch Capabilities Index: their 95% confidence intervals overlap.
Overview
Pricing
Prices on the route and tier chosen under each model
What will it cost?
Estimate a month of requests on the route and tier chosen for each model
Uses the route and tier chosen under each model, over 30 days. Cached input is billed at the cache-read rate.
Performance
Live gateway traffic
Activity
Tokens sent through Phaseo each day over the last 30 days
Features
Features from the parameters Phaseo routes support
Benchmarks
Only results that two or more of the selected models report get a row
Epoch Capabilities Index Independent
Higher is better · dot is the estimate, band is the 95% confidence interval · Epoch AI, CC BY 4.0
Every interval overlaps, so these models are statistically tied on this index.
Artificial Analysis Intelligence Index Independent
Higher is better · at High effort · 2 of 2 models tested
Where they rank
The five leaders on each capability index, then the compared models. Each model at its best-scoring setting.
Artificial Analysis Intelligence Index62 models ranked
- #1Claude Fable 5.264.6
- #2Gemini 4 Carbon60.0
- #3Claude Opus 5.559.1
- #4GPT-6 Astra56.9
- #5GPT-6.1 Sol54.6
Epoch Capabilities Index165 models ranked
- #1Claude Fable 5.2173.4
- #2Gemini 4 Carbon169.8
- #3GPT-6 Astra169.0
- #4Claude Opus 5.5168.5
- #5GPT-6.1 Sol168.5
Lab-reported results come from each lab’s own launch materials and may use different settings, so none is marked best. Independent results come from third-party evaluators.
Providers
Where each model runs on Phaseo, with standard-tier prices per 1M tokens. Providers that serve more of these models come first.
To price the whole page on one of these providers, pick it under the model’s name at the top.
Details
Claude Fable 5.2 vs Gemini 4 Carbon: side-by-side summary
Claude Fable 5.2 and Gemini 4 Carbon are both available through the Phaseo API, so switching between them is a change of model id rather than a new integration.
Claude Fable 5.2 is from Anthropic. It has a 1,000,000-token context window. On its cheapest route it costs $8.00 per 1M input tokens and $40.00 per 1M output tokens.
Gemini 4 Carbon is from Google. It has a 1,048,576-token context window. On its cheapest route it costs $2.00 per 1M input tokens and $10.00 per 1M output tokens.
Claude Fable 5.2 model details, providers and pricingGemini 4 Carbon model details, providers and pricing
Claude Fable 5.2 vs Gemini 4 Carbon at a glance
| Attribute | Claude Fable 5.2 | Gemini 4 Carbon |
|---|---|---|
| Lab | Anthropic | |
| Input price per 1M tokens | $8.00 | $2.00 |
| Output price per 1M tokens | $40.00 | $10.00 |
| Context window | 1,000,000 tokens | 1,048,576 tokens |
| Max output | 128,000 tokens | 65,536 tokens |
| Artificial Analysis Intelligence Index | 64.6 (#1) | 60.0 (#2) |
Prices are each model's cheapest standard route on Phaseo. Benchmark ranks use each model's best-scoring evaluated setting.
Frequently asked questions
Which is cheaper, Claude Fable 5.2 or Gemini 4 Carbon?
Gemini 4 Carbon is cheaper for both input and output tokens. Claude Fable 5.2 costs $8.00 per 1M input tokens and $40.00 per 1M output tokens; Gemini 4 Carbon costs $2.00 and $10.00, each on its cheapest standard route on Phaseo.
Which has the longer context window, Claude Fable 5.2 or Gemini 4 Carbon?
Gemini 4 Carbon has the longer context window at 1,048,576 tokens, compared with 1,000,000 tokens for Claude Fable 5.2.
Which scores higher on the Artificial Analysis Intelligence Index, Claude Fable 5.2 or Gemini 4 Carbon?
Claude Fable 5.2 scores higher on the Artificial Analysis Intelligence Index. Claude Fable 5.2 scores 64.6, ranked #1 of 62. Gemini 4 Carbon scores 60.0, ranked #2 of 62.
Which is faster on Phaseo, Claude Fable 5.2 or Gemini 4 Carbon?
Gemini 4 Carbon generates a median 15 tokens per second through Phaseo, compared with 1 for Claude Fable 5.2.
Can I use Claude Fable 5.2 and Gemini 4 Carbon through one API?
Yes. Both are served through the Phaseo API, so you can switch between them by changing the model id.